Search results for "Virtual"

Processi educativi tra reale e virtuale.Analisi teorica di un progetto per l'inclusione sociale

2007

Perceived Product Risk while Shopping Online: Does Virtual Reality vs. 2D Reduce Uncertainty?

2019

This research explores if a virtual reality (VR) vs. a 2D display of an online shop reduces the perceived product risk. Thereby the role of the sense of presence (SoP) will be analyzed and whether the evocation of the SoP can be predicted by the possibility to interact with the virtual environment as well as by the social connectivity with a friend while shopping online. The results of three empirical studies affirm the importance of a VR display to reduce uncertainties regarding the products in online shops and outline techniques how to trigger the SoP.

Usefulness of an Internet-based thematic learning network: comparison of effectiveness with traditional teaching.

2006

UniNet is an Internet-based thematic network for a virtual community of users (VCU). It supports one multidisciplinary community of doctoral students, who receive most of the courses on the network. The evident advantages of distance learning by Internet, in terms of costs, comfort, etc., require a previous evaluation of the system, focusing on the learning outcomes of the student. The aim was to evaluate the real learning of the students of doctorate courses, by comparing the effectiveness of distance learning in UniNet with traditional classroom-based teaching. Five doctorate courses were taught simultaneously to two independent groups of students in two ways: one, through the UniNet Netw…

Managing IT implementation in virtual enterprises

1996

Konferansebidrag fra Engineering and Technology Management 1996 Vancouver. IEMC 1996 The paper presents a framework of factors influencing information technology (IT) implementation in virtual enterprises. The framework is based on previous research on IT implementation, and field studies conducted in virtual enterprises. The aim is to increase the understanding of the implementation process in this organizational context, and the framework is intended as a basis for developing strategies for successful management of this process

Fundamental elements regarding the approach of risk management within the international projects with teams in the virtual environment

2021

International projects with teams in the virtual environment (IPTVE) are known as complex and high risk projects, these features being considered as significant obstacles to project success. Applying the appropriate risk management methodology could increase their success rate, becoming a fundamental tool for decision making. Research on IPTVE management risks is scarce, focused on specific sectors as software development or construction, without taking into account the differences between traditional and international projects. Thereby, risk management within IPTVE becomes a necessary approach for the performance in managing international projects. This article aims to improve the risk man…

Approaches to evaluate the virtual instrumentation measurement uncertainties

2002

This paper deals with the metrological characterization of virtual instruments. After a brief description of the features, the components and the working principle of the virtual instruments and the various uncertainty sources are analyzed. Then, two methods to evaluate the uncertainty of the measurement results are presented: a numerical method simulating the physical process of the A/D conversion, and an approximated theoretical method applying the "uncertainty propagation law" of the "guide to the expression of uncertainty in measurement." With both methods, the combined standard uncertainty of the measurement result is obtained, starting from the standard uncertainty generated by each s…

Measurement uncertainty estimation of a virtual instrument

2002

The law of uncertainty propagation is applied to a PC-based virtual instrument. According to the "guide to the expression of uncertainty in measurement", the measuring model and the various sources of uncertainty have been taken into account. The expressions of the combined output uncertainty in various basic digital signal processing blocks, are obtained starting from each input sample absolute accuracy, without taking into account the parameters which regard the overall behavior of an acquisition board, such as the effective number of bits. In order to verify this procedure, the results obtained by means of the theoretical analysis, are compared with the ones obtained from numerical simul…

A Prospective Observational Study on the Structuring Process and Implementation of a Large Regional, Inter-hospital, Virtual Multidisciplinary Tumor …

2022

Background/Aim: At present, multidisciplinary tumor boards (MDTB) are considered best practice in oncology. However, web-based virtualization of MDTB may increase participation in meetings, the number of cases discussed, and adherence to guidelines, deliver better treatment, and eventually improve outcomes for patients with prostate cancer. Patients and Methods: This is an observational study focused on exploring the structuring process and implementing a multi-institutional virtual MDTB in Sicily, Italy. Other endpoints included the analysis of cooperation between participants, adherence to guidelines, patient outcomes, and patient satisfaction. Results: Overall, 126 patients were referred…

Extracellular loop 2 of G protein-coupled olfactory receptors is critical for odorant recognition

2021

International audience; G protein-coupled olfactory receptors (ORs) enable us to detect innumerous odorants. They are also ectopically expressed in non-olfactory tissues and emerging as attractive drug targets. ORs can be promiscuous or highly specific, which is part of a larger mechanism for odor discrimination. Here, we demonstrate that the OR extracellular loop 2 (ECL2) plays critical roles in OR promiscuity and specificity. Using site-directed mutagenesis and molecular modeling, we constructed 3D OR models in which ECL2 forms a lid over the orthosteric pocket. We demonstrate using molecular dynamics simulations that ECL2 controls the shape and the volume of the odorant-binding pocket, m…

Getting Docking into Shape Using Negative Image-Based Rescoring

2019

The failure of default scoring functions to ensure virtual screening enrichment is a persistent problem for the molecular docking algorithms used in the structure-based drug discovery. To remedy this problem, elaborate rescoring and post-processing schemes have been developed with a varying degree of success, specificity, and cost. The negative imagebased rescoring (R-NiB) has been shown to improve the flexible docking performance markedly with a variety of drug targets.The yield improvement is achieved by comparing the alternative docking poses against the negative image of the target protein’s ligand-binding cavity. In other words, the shape and electrostatics of the binding pocket is dir…